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【单选题】
下列有关舌下腺位置毗邻的描述中正确的是（）A.
位黏膜舌下襞深面、舌骨舌肌上方
B.
内侧面与颏舌骨肌相邻
C.
外侧面与翼内肌相邻
D.
后端与颌下腺浅部相邻
E.
前端在中线与对侧舌下腺相遇
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举一反三
【单选题】According to the passage, film industry executives have been reluctant to support African-American cinema for which of the following reasons?
A.
Executives believe that African-American audiences are often repelled by the presentation of ideological issues in film.
B.
Executives conclude that African-American cinema is not likely to attract audiences overseas.
C.
Executives are of the opinion that African-American actors who emerge as stars are reluctant for the executives to associate them with 'black' films.
D.
Executives are under the impression that there are many strong African- American producers, but few willing to work with mainstream studios.
E.
Executives are reluctant to support films which contain too many negative stereotypes about African-Americans.
【单选题】What is NOT true according to the article?
A.
Executives tend to ignore doctors' advice and warnings.
B.
Executives are sensitive to pressure from the younger generation.
C.
All chief executives can earn millions of dollars a year.
D.
Executives are careful of what they eat.
【简答题】What are the responsibilities of the senior executives in a company? They establish the ______ for their companies.
【单选题】下列有关TCP和UDP的说法错误的是( )。
A.
数据从应用程序中以字节流的形式传给TCP,而在UDP中,应用程序发送的是数据块
B.
在TCP传输控制中,序号和确认号用来确保传输的可靠性。
C.
UDP并不提供对IP协议的可靠机制、流控制以及错误恢复功能等
D.
网络文件系统(NFS)、简单网络管理协议(SNMP)、域名系统(DNS)以及简单父件传输系统(TFTP)的传输层都是用TCP实现的。
【单选题】自然保护区分为 _________ 。
A.
国家级自然保护区和地方级自然保护区
B.
国家重点自然保护区、省级自然保护区
C.
国家重点自然保护区、省级自然保护区和市、县级自然保护区
D.
国家级自然保护区、省级自然保护区和地方自然保护区
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